<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>css样式</title>
<!--外部样式写在link语句中-->
<link rel="stylesheet" type="text/css" href="../ccs/css1bodystyle.css">
<link rel="stylesheet" type="text/css" href="../ccs/css4base.css">
<!--内部样式表写在head中-->
   <style type="text/css">
       /*内部选择器*/
       body{
           background: chocolate;
       }
       /*
       类选择器
        */
       .bgcolor5{
           background: red;
       }
   </style>

</head>
<!--内联样式表-->
<body  style="background: blue" class="bgcolor5">
</body>
</html>